Pirelli have released a handy info-graphic explaining the tyres drivers have available for the Canadian Grand Prix today.
The graphic splits availability between new and used compounds.
The lack of new ultra soft tyres available for Mercedes, Ferrari, Red Bull and Williams further supports the theory that a single stop strategy will be the most likely approach to the race should conditions be dry.
Drivers qualifying in the top ten must start the race on the tyres they their completed fastest laps in Q2 with. Non of these drivers have a second set of Ultra Soft tyres available for the race.
Wilde Consulting 